Setting SSO for 2 Domains

Hi,

I'm trying to setup a SSO for 2 Domains (different servers & different IP address) in a single livecycle server.

I used SPNEGO in this case and succesfully added both domains as enterprise domain, Kerberos authentication was tested succesfully with SPNEGO enabled.

But SSO only works in the domain the livecycle server resides.

Lets say Livecycle server is in DOMAIN A, all ther users in DOMAIN A can access to livecycle via SSO.

But SSO is not working for users in DOMAIN B.

When refer to the log, the error is:-

None of the available AuthProviders could authenticate the user

I refer back to the guide http://help.adobe.com/en_US/livecycle/9.0/adminHelp/admin.htm?content=000049.html, and notice it stated the following:-

So, this means that it is not possible for another domain to setup SSO?

Any help?

Thanks.

Lionel